Update chefstyle requirement from = 2.0.5 to = 2.0.7

Updates the requirements on [chefstyle](https://github.com/chef/chefstyle) to permit the latest version.
- [Release notes](https://github.com/chef/chefstyle/releases)
- [Changelog](https://github.com/chef/chefstyle/blob/master/CHANGELOG.md)
- [Commits](chef/chefstyle@v2.0.5...v2.0.7)

---
updated-dependencies:
- dependency-name: chefstyle
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <[email protected]>

kitchen-dsc.gemspec

@@ -31,6 +31,6 @@ Gem::Specification.new do |s|
   # style and complexity libraries are tightly version pinned as newer releases
   # may introduce new and undesireable style choices which would be immediately
   # enforced in CI
-  s.add_development_dependency "chefstyle", "2.0.5"
+  s.add_development_dependency "chefstyle", "2.0.7"
   s.add_development_dependency "cane", "3.0.0"
 end